150 
N. TuBeErostssima. F.p. 320.—NeER1TA T. Mont. 
Sup. p. 150. ¢. 29. f. 5.—Pellucid, white, whorls four, 
marked with four spiral broken tubercular ridges, the 
upper volutions small; umbilicus large. 3. Dunéar, 
very rare. 
N. Intricata. F. p. 319.—NeErita i. Don. t. 
167.—N. Canrena. Mont. Sup. p. 148.—N. Can- 
RENA. VAR. M. D. p. 978.—Smooth, livid,with bands 
of sagittate ferruginous lines ; umbilicus large and fur- 
uished with two spiral ridges and two grooves. 2. 
Weymouth, rare. 
N. Patuipura. F. p. 320'—Nerita P. Don. t. 
16. f. 1.—Mont. p. 468.—D. p. 986.—Da Cos. t. 4. 
jf. 4.—Tvurpo Patuives. Turt. D. p. 192.—Lacuna 
P. Turt. in Z. J. 3. p. 190.—Smooth, thin, subpel- 
lucid, brownish yellow, depressed, but three whorls, 
the last extremely large, pillar lip white with a very 
wide groove leading to the deep umbilicus; outer lip 
very effuse. 3...3. On sea-weeds at low water mark, 
common. 
N. Lacuna. F. p. 320.—Heuix L. Mont. p. 428. 
t.13. f. 6.—D. p. 917.—Lin. T. 8. p. 201.—Turso 
L. Turt. D. p, 193. ¢. 25. f. 87, 89.—Lacuna Mon- 
TacuTi. Turt. in Z. J. 3. p. 191.—Thin, pellucid, 
